Cathode seal including migration resistant dielectric material

Cavity length control apparatus for a multioscillator

Ceilometric method and apparatus

Centering and caging mechanism for gyroscope

Centrifugal brake for a gyroscope with cardan suspension

Chromatic diffraction range finder

Circuitry for encoding altimeter

Clamp level

Clamping level tool

Clock

Cluster dither apparatus

Coded target and photogrammetry method using such targets

Coherent pickup error cancellation device

Coincidence sensor for optical rangefinders

Collision avoidance and warning system

Color coded light for automated shape measurement using...

Combination compass

Combination interlocking segmented level

Combined angular displacement measuring system and multiplier

Combined relative and absolute positioning method and apparatus